316 



THETIS SCIENTIFIC RESULTS. 



CUNA DELTA, Tate & May, sp. 



Carditella delta, Tate & May, Trans. Roy. Soc. S.A.,xxiv., 1900, 

 p. 102; Id., Proc. T.inn. Soc. N.S.W., xxvi., 1901, p. 434, 

 pi. xxvii., f. 100, 101; Id., Hedley, Rec. Aust. Mus., iv., 

 1901, p. 2.3, f. 5. 



Station 13. 



A few immature and separate valves from off Cape Three 

 Points in 41-50 fathoms. 



CUNA PARTICULA, sp. nov. 



(Fig. 56.) 



Stations 13, 49. 



Shell small, shallow, oblique, very inequilateral, especially in the 

 younger stage. Colour pale yellow. Anterior margin abruptly 



CuNA PARTICULA. 



Fig. 56. 

 truncated. Sculpture : numerous fine, close, concentric thi'eads, 

 becoming coarser and more distant towards the ventral margin. 

 A few opaque radial lines appear in transmitted light, but do not 

 affect the sculpture. Inner ventral margin crenulated by about 

 16 small interlocking tubercles. Chondrophore less deeply sunk 

 than in the preceding species. Above the cardinal of the left 

 valve are two small semidetached round tubercles. Height, 

 2 mm. ; length, 2-3 mm. 



Abundant in 63-75 fathoms off" Port Kombla, and in 41-50 

 fathoms off Cape Three Points. 



